1:N Communication (Computer Link) - Panasonic FP E Series User Manual

7.4.3 1:N Communication (Computer Link)

Overview
For a 1:N computer link, the computer and the FPΣ are connected through a commercially available
RS232C-RS485 conversion adapter, and the respective PLCs are wired using an RS485 cable.
The computer and the PLC communicate via commands and responses: The computer sends a
command specifying the unit number, and the PLC with that unit number sends a response back to the
computer.
When data is transmitted from FPΣ via the RS485 communication of AFPG806 (COM4), start the
transmission of the data to FPΣ after the time mentioned blow passes at a receiver.
In case of 19200 bps: 1 ms
Note) Lineeye SI-35 is recommended to be used as a conversion adapter.
Setting system registers
Setting of COM1 port
No.
No. 410 COM1 port unit number
No. 412 COM1 port selection of communication mode
No. 413 Communication format for COM1 port
No. 415 Baud rate setting for COM1 port
Note1) The communication format and baud rate (communication speed) should be set to match the
connected computer.
Note2) The RS485 port of the AFPG806 is either 19200 bps or 115200 bps only.
Also the baud rate must be identically set by the system register and the dip switch in the
communication cassette.
Reference: <7.1.4 Setting of AFPG806 Switch>
Note3) Setting the unit number setting switch to 0 makes the system register settings valid.
Note4) Connect the "−" terminal and the "E" terminal with a lead wire to make the termination resistance
of the AFPG803 effective.
The termination resistance of the AFPG806 is specified by the dip switch located in the
communication cassette.
In case of 115200 bps: 200µs
Name Set value
1 to 99 (Set the desired unit number)
(With a C-NET adapter, a maximum of
32 units (stations) can be specified.)
Computer link
Data length: ...... 7 bits/8 bits
Parity check: ..... None/Odd/Even
Stop bit: ............ 1 bit/2 bit
Terminator: ........ CR
Header: ............ STX not exist
2400 to 115200 bps
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